Most Helpful Girl

i think it means that as humans we implement all sorts of rules, morals, boundaries and such into our lives because we think that it's the best/healthiest way to live but the second part is saying that the only way to survive in this world is to adapt without restrictions and never be limited by your "rules". he's suggesting that to live with rules is bad for you, your life etc. i tried to put it as simply as possible

What Girls Said 1

Some people think the best ways to live is through self-rule. Others interpret that as pure anarchy that would lead to chaos, but that's not necessarily true... I think the Joker was just pointing out that we are all quite restricted by the rules in place. Though personally, i don't think all these rules are bad.